instrument replacement parts

Hello All,
Does anyone know of a source for replacement control units for the
Reichert-Jung 2050 Supercut automated microtome? We have a 15 year old
instrument which is mechanically fine, but the microprocessor unit has
failed. The manufacturer no longer makes or warehouses this unit. Thanks
for any ideas.
Denise Crowley
Center for Cancer Research
MIT
Cambridge, MA